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Masses of Ground States of Triply Heavy Tetraquarks 三重重四夸克的基态质量
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701594
V. O. Galkin, E. M. Savchenko
{"title":"Masses of Ground States of Triply Heavy Tetraquarks","authors":"V. O. Galkin,&nbsp;E. M. Savchenko","doi":"10.1134/S1063779624701594","DOIUrl":"10.1134/S1063779624701594","url":null,"abstract":"<p>Masses of ground states of triply heavy tetraquarks are calculated within the relativistic quark model based on the quasipotential approach and the diquark–antidiquark picture of tetraquarks. The relativistic diquark–antidiquark interaction quasipotential takes into account the internal structure of the diquark and antidiquark and all relativistic corrections. The calculated masses are compared to fall-apart decay thresholds into a meson pair, and conclusions are drawn about the possibility of detecting such states.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"330 - 334"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Intensity Polarized Ion Sources for the High-Energy Accelerators and Colliders 用于高能加速器和对撞机的高强度极化离子源
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701624
A. Zelenski
{"title":"High-Intensity Polarized Ion Sources for the High-Energy Accelerators and Colliders","authors":"A. Zelenski","doi":"10.1134/S1063779624701624","DOIUrl":"10.1134/S1063779624701624","url":null,"abstract":"<p>The latest achievements in the development of polarized proton, negative hydrogen ions H<sup>–</sup>, D<sup>+</sup>(D<sup>–</sup>), and 3He<sup>++</sup> sources are presented. The development of new polarization techniques is carried out in BNL, JINR, INR RAS, and other laboratories. Polarized deuteron beams will be required for the polarization program at the NICA collider and in the experiment to search for the electric dipole moment of the proton and the deuteron. Experiments with polarized 3He<sup>++</sup> ion beams are part of the experimental program at the NICA collider and the future electron-ion collider (EIC).</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"346 - 354"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pair Production of Charmonia in the LHCb Experiment in the Parton Reggeization Approach Parton正则化方法下LHCb实验中Charmonia的对产生
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701685
V. A. Saleev, A. A. Chernyshev
{"title":"Pair Production of Charmonia in the LHCb Experiment in the Parton Reggeization Approach","authors":"V. A. Saleev,&nbsp;A. A. Chernyshev","doi":"10.1134/S1063779624701685","DOIUrl":"10.1134/S1063779624701685","url":null,"abstract":"<p>Pair production of prompt <span>(1S)</span> and <span>(2S)</span> charmonia states is studied in the improved color evaporation model using high energy factorization as formulated in the Parton Reggeization Approach. The latter is based on the modified Kimber–Martin–Ryskin–Watt model for unintegrated parton distribution functions and Lipatov’s effective theory for processes in multi-Regge kinematics. We predict cross sections for pair <span>(psi [1S] + psi [1S,2S])</span> production by considering processes of single and double parton scattering and using the set of model parameters fixed earlier in the description of pair <span>(1S)</span>-charmonia states production at the LHC energies. Numerical calculations at the parton level were conducted using Monte Carlo event generator KaTie. Results of calculations are compared with recent LHCb Collaboration data at <span>(sqrt s = 13)</span> TeV.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"387 - 392"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Steadiness of Stabilized Randall–Sundrum Model with Respect to Casimir Effect 考虑卡西米尔效应的稳定Randall-Sundrum模型的稳定性
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701363
E. R. Rakhmetov, I. P. Volobuev, S. I. Keizerov
{"title":"Steadiness of Stabilized Randall–Sundrum Model with Respect to Casimir Effect","authors":"E. R. Rakhmetov,&nbsp;I. P. Volobuev,&nbsp;S. I. Keizerov","doi":"10.1134/S1063779624701363","DOIUrl":"10.1134/S1063779624701363","url":null,"abstract":"<p>The paper considers the Casimir effect in the stabilized Randall–Sundrum model, which arises due to the propagation of the gravitational field and the Goldberger–Wise scalar field in the five-dimensional bulk between two branes. The Casimir energy density of the scalar modes is calculated analytically. Using the dimensional regularization method and writing the regularized energy density as the Hurwitz zeta function, divergences are identified and the Casimir energy density of the scalar modes is renormalized. Similar estimates are made for the Casimir energy density of tensor modes. An estimate of the Casimir effect is made considering all the modes on the equations and parameters of the model. It is found that such quantum corrections do not change the form of the solution of the equations of motion of the model and lead only to a negligible decrease in the background scalar field on the Planck brane and the distance between the branes; i.e., the model is stable with respect to the Casimir effect.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"168 - 172"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Spatial-Sensitive Detector Based on Strong Scattering Scintillating Media 基于强散射闪烁介质的空间敏感探测器
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701405
A. L. Krapiva, D. N. Svirida
{"title":"The Spatial-Sensitive Detector Based on Strong Scattering Scintillating Media","authors":"A. L. Krapiva,&nbsp;D. N. Svirida","doi":"10.1134/S1063779624701405","DOIUrl":"10.1134/S1063779624701405","url":null,"abstract":"<p>Scintillation detectors based on strong scattering media are a new solution for spatial-sensitive detectors of particles with no segmentation of a sensitive volume. One of the modifications of such a medium can be few-millimeter-sized granules of a solid scintillator. This article describes the design of a prototype of such a detector, the process of its calibration, the algorithm of the coordinate reconstruction, and the results of simulation.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"191 - 194"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent Results from the ATLAS and CMS Experiments at Large Hadron Collider (LHC) 大型强子对撞机（LHC）上ATLAS和CMS实验的最新结果
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701545
A. G. Myagkov
{"title":"Recent Results from the ATLAS and CMS Experiments at Large Hadron Collider (LHC)","authors":"A. G. Myagkov","doi":"10.1134/S1063779624701545","DOIUrl":"10.1134/S1063779624701545","url":null,"abstract":"<p>This review presents new results from the ATLAS and CMS experiments obtained at the Large Hadron Collider.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"288 - 296"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sensitivity of the Three Top Quark Production Process to the Contribution of Top-Related SMEFT Operators 三顶夸克生产过程对顶相关SMEFT算子贡献的敏感性
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701661
A. M. Aleshko, E. E. Boos, V. E. Bunichev, L. V. Dudko
{"title":"Sensitivity of the Three Top Quark Production Process to the Contribution of Top-Related SMEFT Operators","authors":"A. M. Aleshko,&nbsp;E. E. Boos,&nbsp;V. E. Bunichev,&nbsp;L. V. Dudko","doi":"10.1134/S1063779624701661","DOIUrl":"10.1134/S1063779624701661","url":null,"abstract":"<p>The sensitivity of the three top quark production process to the potential contribution of the SMEFT top-related operators was investigated. Theoretical restrictions on the Wilson coefficients of the corresponding operators are obtained for the scenarios of the LHC, HL-LHC, HE-LHC, and FCC experiments. It is shown how these restrictions change with increasing energies and luminosities of the considered scenarios. It was demonstrated that the process constrains the following four-fermion operators relatively well: <span>(O_{{QQ}}^{1})</span>, <span>(O_{{Qq}}^{{1,8}})</span>, <span>(O_{{Qq}}^{{1,1}})</span>, <span>(O_{{Qq}}^{{3,8}})</span>, <span>(O_{{Qq}}^{{1,3}})</span>, <span>(O_{{Qt}}^{1})</span>, <span>(O_{{tq}}^{8})</span>, and it is also sensitive to the following operators with bosonic fields: <span>({{O}_{{tW}}})</span> and <span>({{O}_{{tG}}})</span>.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"374 - 380"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Color Transparency in Hard pd Collisions 硬pd碰撞中的颜色透明度
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701673
A. B. Larionov
{"title":"Color Transparency in Hard pd Collisions","authors":"A. B. Larionov","doi":"10.1134/S1063779624701673","DOIUrl":"10.1134/S1063779624701673","url":null,"abstract":"<p>As one of the predictions of perturbative quantum chromodynamics (QCD), the effect of color transparency has been the focus of attention in the community studying the modifications of hadrons in a nuclear medium for several decades. The search for this effect in reactions on heavy nuclei can be complicated by uncertainties in nuclear characteristics (nucleon density distributions and wave functions), which can affect the interpretation of experiments. In this paper, we consider the <span>(d(p,pp)n)</span> reaction at <span>({{p}_{{{text{lab}}}}} = 15)</span> GeV/<i>c</i> due to hard elastic <span>(pp)</span> scattering, in which these uncertainties are actually reduced to deuteron wave function behavior at high momenta. It is shown that, for transverse momenta of the spectator neutron below 0.4 GeV/<i>c</i>, the choice of a deuteron wave function cannot influence the identification of color transparency effect. A simple method of studying the color transparency in <span>(dd)</span> collisions via the identification of quasi-free <span>(pd)</span> interactions is proposed.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"381 - 386"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrable Cosmological Models with an Arbitrary Number of Scalar Fields 具有任意数量标量场的可积宇宙学模型
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S106377962470134X
V. R. Ivanov, S. Yu. Vernov
{"title":"Integrable Cosmological Models with an Arbitrary Number of Scalar Fields","authors":"V. R. Ivanov,&nbsp;S. Yu. Vernov","doi":"10.1134/S106377962470134X","DOIUrl":"10.1134/S106377962470134X","url":null,"abstract":"<p>We consider cosmological models with an arbitrary number of scalar fields non-minimally coupled to gravity and construct new integrable cosmological models. In the constructed models, the Ricci scalar is an integral of motion irrespectively of the type of metric. The general solutions of evolution equations in the spatially flat FLRW metric have been found for models with the quartic potentials.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"157 - 161"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shadows of Galactic Centers: from Supermassive Black Holes to Naked Singularities and Wormholes 银河中心的阴影：从超大质量黑洞到裸奇点和虫洞
IF 0.6 4区 物理与天体物理
Physics of Particles and Nuclei Pub Date : 2025-05-20 DOI: 10.1134/S1063779624701314
A. F. Zakharov
{"title":"Shadows of Galactic Centers: from Supermassive Black Holes to Naked Singularities and Wormholes","authors":"A. F. Zakharov","doi":"10.1134/S1063779624701314","DOIUrl":"10.1134/S1063779624701314","url":null,"abstract":"<p>The appearance of a shadow (a dark spot in the vicinity of a black hole) was first considered in a thought experiment by James Bardeen in 1973. However, he did not discuss the possibility of astronomical observations of the shadow, since its size was too small for all known estimates of black hole masses and distances to them. In addition, Bardeen’s assumption of a luminous screen behind the black hole seemed unrealistic. In 2005, we predicted that if we observe a supermassive black hole in the Galactic Center in the mm- or submillimeter range, we will be able to detect a dark spot (shadow) with a size (diameter) of approximately 50 angular µs (µas) (since, as indicated in the text of the cited paper, <span>({{r}_{{text{g}}}} = 10)</span> µas for the black hole in the Galactic Center, while the size of the shadow is <span>({{(27)}^{{{1 mathord{left/ {vphantom {1 2}} right. kern-0em} 2}}}}{{r}_{{text{g}}}})</span>). This prediction was confirmed in 2022 after processing the observations of the Galactic Center obtained by the Event Horizon Telescope Collaboration (the corresponding observations were conducted in 2017). Previously, we obtained analytical relationships for the size of the shadow both for the Reissner—Nordström black holes with an electric charge and with a tidal charge, which can arise due to the presence of an additional dimension. Thus, it proves to be possible to limit the charges (including tidal ones) for Sgr A* and М87* based on the shadow sizes obtained from observations in the vicinity of these objects. The issues concerning the presence of shadows in the vicinity of naked singularities and wormholes are discussed.</p>","PeriodicalId":729,"journal":{"name":"Physics of Particles and Nuclei","volume":"56 2","pages":"140 - 145"},"PeriodicalIF":0.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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